Dynamo-electric machine, particularly applicable for ignition purposes in connection with internal-combustion engines.



A. H. MIDGLEY & C. A. VANDERVELL. DYNAMO ELECTRIC MAGHINE,PARTIGULARLY APPLICABLE FOR IGNITION PURPOSES IN CONNECTION WITH INTERNAL COMBUSTION ENGINES.

APPLIOATION FILED DEC. 6, 1910.

1,068,152. Paigented July 22, 1913.

- tion systememploying to the ignition circuit,.but owing-fto thfh vanable speed of the internal combustion engine where electric ignition and electric lighting 1 with the distributing device attached there- A preferably of the type described in *plication for United States Patent Serial in connection with internal combustion en- -With a high ftension system} depending for long as'the batteriesaieofflarge capacity a generator cannot be difiiculties and enables the combined: effect internal combustion engine.

UNITED STA'lE IS Pig lENT OFFICE.

ALBERT HENRY MIDGLEY ND CHARLES ANTHONY VANDERVELL, or ACTON VALE, ENGLAND;

DYNAMO-ELECTRIC MACHINE, PARTICULARLY APPLICABLE FOR IGNITION ?URPOSES IN CONNECTION WITHINTERNAL-COMBUSTION. ENGINES.

Specification of Letters Patent.

Patented July 22, 1913.

Application filed December 6, 1910i Serial No. 595,?52.

To all whom it may concern:

Be it known that we, ALBERT HENRY hIIDGLEY and CHARLES ANTHONY VANDEn- VELL, subjects of the Kingof GreatBrita'in and Ireland, residingvat Warple Way, Acton Vale, in thecounty of Middlesex, England, have invented new and useful improvements in andrelating to dynamo-electric machines particularly applicable for ignition'purposcs gines,of

ion;

llhis' inventionrela'tes to an electric igni direct 'curi'entfor use in connection with internal combustion -en-' gines'and has for its-object jr'the provision of meanswhereby ":fllB soured of current for ignition purposes canbeu'sed-as a source of which the following is a specificahtin'g'purposesalso.

In connect1on. .-with internal combustion inotorzboats, it has been customary; to utilize either one of two systems} namely,- a high: tension system or a low, tension system;-

its; electric energy on secondary batteries so lighting circuit can-'be1-installed'iii addition it'has been impossihle'up tothe presenttoj utilizea dynamo driven 'thereby' without complicated cut out devices. (*In systems "inwhicli a magneto generator is used, "s'uch utilized for the-purpose of charging the batteryowing '-to the gre'at variation in'voltage of speed through which the prime mover op crates, consequently great complexity of-xap paratus or great weight ofjplant isinvol ved are to be installed v boat. Our invention overcomesall these to'be carried out by the use'of one-generatorto, so that only a single drivingfconnection has to be'made between the dynamo-and the we take.

' To carry our inven 'on into efi'ect,

a variable speed constant voltage dynamo the. ap

No. 571351 of the 11th of July 1910 and on work. may mount the dist-ributer upon'a'n inde f rm and due to the/wide. rangeon: theisame veh cle or" -tion:. Fig.2 is a tion of the vvario the shaft of the same we mount direct, a dis- 55 tributer having the proper number of contacts for the multi-cyli-nder intei'inl combustion' engine'with which the device has to In conjunction or equivalently we pendent axis and drive it. by means of suit able gearing from the ti on-with'the armature we also give time variation in the sage of the current in order toad-Vance or retard' the spark atithe firing-plugs."z-.This dynamo is connected to the mains for charging thesecondarycbattery from which the current for lighting purpose's'is derived and 70.

is also connected with the usual electricah devices.

systems at the present timev "and the; "field' coils oft-he dynamo are alsoconnected-acrossv ,thes'econdary batre ry in orderjto maintain the currentexciting the fieldnnagnets 'at a, constant voltage so asto insure=constant8o current-from battery;

1 the dyna'mo'toubefed to ithe all the other apparatus such as magnetos or V independent-secondary batteries: are entirelyeliminated' from theinstallatio'n'of electrical A. 'appliances lfor car work. the chiliculties consequentthereom A 'Iniorder' that the invention may be he better; understod, we will now "proceed to describethe same, in relation to the accom panyin -drawing,..ef erence bein'g'had to. the" A '1. 5 c to-like parts in thevari-g letters-and Like letters refe ous figures.

marked thereon.

=;'-":.- Figure l is ase'ctional view -of'a dynamo j V constructed in accordance withour invendiagrammatic representa-f 100 us devices and electrical connections for low tension ignitionQ Fig. 3-

high tension ignition.

is a similar diagrammatic representation for Referring to F igr 1 in. which we illustrate 105 a dynamo arranged for a four cylinder internal combustion engine, the armature a is, directly geared to the shaft 1) of the internal armature. Inconnec- I v arrange a emake and break contact device adapt'edto period of the pasv such as-condenser, induction-coil or, other transfo rming' device and'the high 'or lowftensioir firing plugs of the --ordinary- "arrangement utilized 'i-n- 'known .It will be seen that by the use "of a "sei's- Jeontained variable; speed constant voltage dynamo with'distributerand contact breaker i and the usual commutator c6 and brushes 6 "'Copies of this patent are provided for collecting the current from the armature a. At the right hand end of the machine a. make and break device f is arranged, the timing operation of which in relation to the. engine is eflt'ected by rocking the casing g about its axis by means of the lever 12. in the usual manner. At theleft hand end of the machine a distributer 7' is provided having the same number of contacts as there are cylinders to the engine. The brush is of the distributer is rotated by means of spur gearing b from the shaft of the armature a; such gearing in the present instance being in the ratio of 1 to 2.

In Fig. 2 the arrangement of the various parts relative to the electric circuits connecting them is clearly indicated.- In this case the firing plugs in are of almechanical type electrically operated. vThe battery 12. is placed across the mains as are also-the various lamps oof the lighting installation.

79 p represent the coils of the field magnetsof the machine which. are connected up across the terminals of the battery for the purpose hereinbefore described, and g representstheicondenscr placed in thecircui't in the usual manner. ;In Fig. 3 similar arrangements are dia rannnatically illustrated for the ordinary-big tension ignition plugs, the only difference being asmall variation in the circuit in order to deal with-the high nsion and low tension currents. In this purpose hereinbeforedescribed.

'Having thus fully described our invention we'claim as new and desire-to secure by Letters Patent V 2 1. An ignition system comprising a direct current dynamo havinga field magnet-sysase .also the field, magnets areconnected up v across the terminalsof thebattery for the charged with current from said armature in combination with a distributerdriven positively from said armature adapted to dis tribute current from said armature to act on the ignition device of each cylinder of an internal combustion engine and a make and break device driven positively from said armature for controlling the current from said distributer, substantially as described.

2. In'purposes of the class described, in combination, a constant direct current gen'- erator provided with an armature adapted.

tolbe driven by aninternal combustion engine, an ignition device for the engine, a

distributer positively driven by said armas ture to distribute current to the ignition device, a make and break device .da'iven pcsitivelty by said armature to control the current rom said distributer', said armature.

being provided with a commutator, brushes j positively'associated with said commutator,

conducting mains connected to said "brushes a field magnet system havingcoilscgnnected across said mains and a. storage ba t-tefy;con-, nccted across said mains and adapted'f to be generator,

charged with current from said substantially as .described.

In testimony Wherefofwe two subscribing Witnesses.

ALBERT HENRY .liIlDGLEY; Y Y CHARLES ANTHONY VANDERVELL. \Vitnesses:

RICHARD A. HOFFMANN, CHARLES J. R. Bur-Lovellmay be obtained for five cents each, by addressing the Commissioner of If; tents,

Washington, D. C."

have signe four names to this specificatlonin the presence of 

